Here is a pretty rare French manufactured Lebel model 1886 M93 fitted with an original A.P.X. 1916 scope. The Lebel M93 used to be the French main sniper rifle during World War I. The APX scopes evoluted from APX 1915 to APX 1917.
Below are three black & white pictures, taken in the trenches, showing French snipers using Lebel M93 rifles mounted with APX scopes.